4 B777 flight attendants reported on a severe turbulence encounter during a flight from rjaa.

Attributes
ACN	604898
Time
Date	200401
Day	Tue
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : rjtg.artcc
State Reference	FO
Environment
Weather Elements	Turbulence
Light	Night
Aircraft 1
Controlling Facilities	artcc : rjtg.artcc
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight attendant : on duty
Experience	flight attendant time airline total : 33 flight attendant time total : 33 flight attendant time type : 50
ASRS Report	604898
Person 2
Affiliation	company : air carrier
Function	flight attendant : on duty
Experience	flight attendant time airline total : 35 flight attendant time total : 35 flight attendant time type : 100
ASRS Report	605293
Events
Anomaly	inflight encounter : weather inflight encounter : turbulence
Independent Detector	other flight crewa other other : 1,2,3,4
Resolutory Action	none taken : anomaly accepted
Consequence	other
Supplementary
Problem Areas	Weather
Primary Problem	Weather

Narrative:

About 1 hour after departure, we were going over a band of thunderheads. The cockpit crew thought we were in the clear above them, but we were not and we hit a big bump and in less than a second later we dropped over 200 ft in less than 1/2 second. All the crew were in the aisle and everyone came off the floor. We were very lucky, all passenger were buckled in. The flight attendants in the very back of the airplane hit the ceiling and the inserts of beverages on top of the cart came down on top of them as they lay on the floor. I hit the ceiling of the md-11 twice in 3 weeks in 1991 so I knew it was about to happen so I tucked into a ball to make myself shorter. I hurt my back and right knee but I didn't hit the ceiling. The aircraft I had, flew apart and all the glass, china, metal serving pieces flew up in the air and the cart collapsed. The glass and china on the passenger's trays flew off in the air and hit the right side wall. We had moderate to heavy turbulence for about another 30 mins and off and on the rest of the way home. Supplemental information from acn 605293: it was followed by more fairly severe turbulence, but no more drops in altitude. Supplemental information from acn 605804: the captain never asked if any of us wanted to go back to rjaa. Most of the flight attendants would have voted to turn back to rjaa. Some passenger, after we arrived in ZZZ, did not want to continue on their connecting flts, they were too upset. To have everyone continue for 7 1/2 hours after such an ordeal is unacceptable.

Original NASA ASRS Text

Title: 4 B777 FLT ATTENDANTS RPTED ON A SEVERE TURB ENCOUNTER DURING A FLT FROM RJAA.

Narrative: ABOUT 1 HR AFTER DEP, WE WERE GOING OVER A BAND OF THUNDERHEADS. THE COCKPIT CREW THOUGHT WE WERE IN THE CLR ABOVE THEM, BUT WE WERE NOT AND WE HIT A BIG BUMP AND IN LESS THAN A SECOND LATER WE DROPPED OVER 200 FT IN LESS THAN 1/2 SECOND. ALL THE CREW WERE IN THE AISLE AND EVERYONE CAME OFF THE FLOOR. WE WERE VERY LUCKY, ALL PAX WERE BUCKLED IN. THE FLT ATTENDANTS IN THE VERY BACK OF THE AIRPLANE HIT THE CEILING AND THE INSERTS OF BEVERAGES ON TOP OF THE CART CAME DOWN ON TOP OF THEM AS THEY LAY ON THE FLOOR. I HIT THE CEILING OF THE MD-11 TWICE IN 3 WKS IN 1991 SO I KNEW IT WAS ABOUT TO HAPPEN SO I TUCKED INTO A BALL TO MAKE MYSELF SHORTER. I HURT MY BACK AND R KNEE BUT I DIDN'T HIT THE CEILING. THE ACFT I HAD, FLEW APART AND ALL THE GLASS, CHINA, METAL SERVING PIECES FLEW UP IN THE AIR AND THE CART COLLAPSED. THE GLASS AND CHINA ON THE PAX'S TRAYS FLEW OFF IN THE AIR AND HIT THE R SIDE WALL. WE HAD MODERATE TO HVY TURB FOR ABOUT ANOTHER 30 MINS AND OFF AND ON THE REST OF THE WAY HOME. SUPPLEMENTAL INFO FROM ACN 605293: IT WAS FOLLOWED BY MORE FAIRLY SEVERE TURB, BUT NO MORE DROPS IN ALT. SUPPLEMENTAL INFO FROM ACN 605804: THE CAPT NEVER ASKED IF ANY OF US WANTED TO GO BACK TO RJAA. MOST OF THE FLT ATTENDANTS WOULD HAVE VOTED TO TURN BACK TO RJAA. SOME PAX, AFTER WE ARRIVED IN ZZZ, DID NOT WANT TO CONTINUE ON THEIR CONNECTING FLTS, THEY WERE TOO UPSET. TO HAVE EVERYONE CONTINUE FOR 7 1/2 HRS AFTER SUCH AN ORDEAL IS UNACCEPTABLE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.